All MIBs › SL-L2TOPOLOGY-MIB › topologyL2LastChange
topologyL2LastChange
Module: SL-L2TOPOLOGY-MIB
OID (symbolic): SL-L2TOPOLOGY-MIB::topologyL2LastChange
OID (numeric): 1.3.6.1.4.1.4515.1.3.10.2.1
Node type: OBJECT-TYPE
Type: TimeStamp
Access: read-only
Description: The value of MIB II's sysUpTime object at the time the TopologyL2LinkTable was last changed.
What is topologyL2LastChange?
This read-only TimeStamp is sysUpTime at the moment the topologyL2LinkTable was last changed, meaning a link was added, removed, or modified. An admin or NMS can poll this single scalar to detect that the L2 topology has changed without walking the entire link table on every poll cycle. For example, a monitoring system polling topologyL2LastChange and seeing it advance would then re-walk topologyL2LinkTable to discover which link entries changed.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4515.1.3.10.2.1 snmpwalk -v2c -c public <target> SL-L2TOPOLOGY-MIB::topologyL2LastChange
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.4515.1.3.10.2.1.1 snmpget -v2c -c public <target> SL-L2TOPOLOGY-MIB::topologyL2LastChange.1
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OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.4515 | smartoptics | SL-NE-MIB |
| 1.3.6.1.4.1.4515.1 | sitelight | SL-NE-MIB |
| 1.3.6.1.4.1.4515.1.3 | slMain | SL-MAIN-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.4515.1.3.10 | slL2Topology | SL-L2TOPOLOGY-MIB |
| 1.3.6.1.4.1.4515.1.3.10.2 | topologyL2Traps | SL-L2TOPOLOGY-MIB |
| 1.3.6.1.4.1.4515.1.3.10.2.1 | topologyL2LastChange | SL-L2TOPOLOGY-MIB |